Ehh I do not know about through it self. I do know that small spaces can will "suck" air (and water vapor with it) in as they do the heat/cool cycles due to pressure changes. This can be seen by leaving a kids sealed plastic toy out side for a few weeks. If you wish to test it you first have to submerge the toy for 24~48 hours in water to make sure its water tight, use cold water and pre-chill the toy in the fridge.
I am curious about how well the cavity filter worked after a CLR treatment. CLR and most other such cleaners for calcium, lime, or rust are based on hydrochloric acid and do a fair job of eating metal. I found out the hard way that it can and will eat a tub drain clean through if left over night. Was the part washed and rinsed with distilled water after the cleaning? On 11/16/07, Dave Hulsebus <[EMAIL PROTECTED]> wrote: > Chris, We had a similar situation this week and found that our cavity > filter was the cause of our problem. I have a number of the 2.5db loss > filters from WR we got five years ago. None have ever been mounted > outdoors. When we opened it up we found calcium deposits in the copper > tuning tubes. We user CLR to clean them and re-inserted in the filters - > problem gone. I had a newer .5db loss filter in an attic of one of our > buildings this past summer, gets up to 150F in the attic. That filter > also had calcium inside. One day all the clients started dropping off > line. That one didn't appear as noise, but as signal loss. An old > machine shop guy told me that aluminum would draw moisture into it over > time. Having been a physicist 30 years ago, I'm not sure I believe what > he said but he's been around for 50 years doing metal work. Anyone else > have a thought on aluminum drawing moisture through itself into the filter. > > Dave Hulsebus > Portative Technologies > > chris cooper wrote: > > We have a WR 900 MHz cell that saw a sudden 10 db jump in noise. > > Running spec ans from other towers doesn't show this rise in noise in > > the same band. Doing sweeps from the tower using another device, albeit > > 600' lower than the affected ap, we still don't see the noise floor > > rise, even when we run a scan pointed straight at the ap. I know we > > cant exactly mirror conditions at the ap from a lower altitude, but > > shouldn't we see some of the noise that it is reporting? Im wondering > > if we have a bad piece of gear up there... > > CPE units seem to be receiving signal as normal, but ap side is having > > trouble hearing them. Could wet connectors cause behavior - we had > > torrential rain followed by high heat. > > > > Thanks > > Chris > > > > -------------------------------------------------------------------------------- > > > > ** Join us at the WISPA Reception at 6:30 PM on October the 16th 2007 at > > ISPCON ** > > ** ISPCON Fall 2007 - October 16-18 - San Jose, CA www.ispcon.com ** > > ** THE INTERNET INDUSTRY EVENT ** > > ** FREE Exhibits and Events Pass available til August 31 ** > > ** Use Customer Code WSEMF7 when you register online at > > http://www.ispcon.com/register.php ** > > > > -------------------------------------------------------------------------------- > > WISPA Wants You! Join today! > > http://signup.wispa.org/ > > -------------------------------------------------------------------------------- > > > > > > > > WISPA Wireless List: wireless@wispa.org > > > > Subscribe/Unsubscribe: > > http://lists.wispa.org/mailman/listinfo/wireless > > > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > > > > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
